Abstract
Weighted residual methods (WRMs) are conceptually different from the finite difference method in that a WRM assumes that the solution can be represented analytically. For example, to obtain the solution of the diffusion equation (3.1) the following approximate solution would be assumed:
where a j(t)are unknown coefficients and ø j (x)are known analytic functions. The terms ø j (x) are often referred to as trial functions and (5.1) as the trial solution. By forcing the analytic behaviour to follow (5.1) some error is introduced unless J is made arbitrarily large. It may be recalled that the finite difference method defines a solution at nodal points only.
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Fletcher, C.A.J. (1998). Weighted Residual Methods. In: Computational Techniques for Fluid Dynamics 1. Springer Series in Computational Physics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-58229-5_5
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DOI: https://doi.org/10.1007/978-3-642-58229-5_5
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